Saint-Jean-sur-Richelieu · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Saint-Jean-sur-Richelieu & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
28°
Thu, Sep 3
Coldest night
9°
Sun, Sep 6
Days with precip
9 / 14
of 14 forecast days
Nicest day
Sun, Sep 6
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
21° 9°
69% precip chance
Sat 12 – Sun 13 Sep
20° 9°
79% precip chance
Sat 19 – Sun 20 Sep
23° 12°
typical range
Sat 26 – Sun 27 Sep
23° 13°
typical range
30 days — Saint-Jean-sur-Richelieu
14 forecast + 16 climatology
Thu · Today Heavy rain
28°18°553.8 mm⌄
Wind18 mph S
Gusts29 mph
UV index6 – High
Precip chance86%
Sunrise06:17
Sunset19:27
Fri · Tomorrow Mostly cloudy
23°15°0.9 mm⌄
Wind11 mph NW
Gusts18 mph
UV index6 – Moderate
Precip chance52%
Sunrise06:18
Sunset19:25
Saturday 5/9 Showers
17°12°0.9 mm⌄
Wind14 mph NE
Gusts27 mph
UV index3 – Low
Precip chance69%
Sunrise06:19
Sunset19:23
Sunday 6/9 Sunny
21°9°9%⌄
Wind12 mph NE
Gusts23 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:20
Sunset19:21
Monday 7/9 Sunny
23°11°11%⌄
Wind14 mph W
Gusts20 mph
UV index6 – High
Precip chance11%
Sunrise06:22
Sunset19:20
Tuesday 8/9 Sunny
19°10°9%⌄
Wind9 mph N
Gusts19 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:23
Sunset19:18
Wednesday 9/9 Mostly cloudy
18°10°1.1 mm⌄
Wind19 mph S
Gusts33 mph
UV index4 – Moderate
Precip chance66%
Sunrise06:24
Sunset19:16
Thursday 10/9 Showers
23°13°4.7 mm⌄
Wind21 mph W
Gusts35 mph
UV index6 – High
Precip chance78%
Sunrise06:25
Sunset19:14
Friday 11/9 Showers
19°12°0.9 mm⌄
Wind18 mph W
Gusts29 mph
UV index5 – Moderate
Precip chance63%
Sunrise06:26
Sunset19:12
Saturday 12/9 Sunny
19°9°8%⌄
Wind12 mph W
Gusts15 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:28
Sunset19:10
Sunday 13/9 Mostly cloudy
20°12°3.9 mm⌄
Wind11 mph S
Gusts25 mph
UV index4 – Moderate
Precip chance79%
Sunrise06:29
Sunset19:08
Monday 14/9 Showers
21°16°4.6 mm⌄
Wind14 mph S
Gusts28 mph
UV index5 – Moderate
Precip chance87%
Sunrise06:30
Sunset19:06
Tuesday 15/9 Fog
21°14°7.3 mm⌄
Wind20 mph S
Gusts33 mph
UV index6 – High
Precip chance88%
Sunrise06:31
Sunset19:04
Wednesday 16/9 Showers
17°9°3.7 mm⌄
Wind18 mph SW
Gusts28 mph
UV index4 – Moderate
Precip chance79%
Sunrise06:32
Sunset19:02
Thursday 17/9 Rain (climatological)
20°12°18.0 mm⌄
Day≈17–23°
Night≈9–15°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
23°13°20%⌄
Day≈20–26°
Night≈10–16°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
23°13°20%⌄
Day≈20–26°
Night≈10–16°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
20°12°20.0 mm⌄
Day≈17–23°
Night≈9–15°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
19°11°20%⌄
Day≈16–22°
Night≈8–14°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
17°10°20%⌄
Day≈14–20°
Night≈7–13°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
19°11°30.0 mm⌄
Day≈16–22°
Night≈8–14°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
21°12°20%⌄
Day≈18–24°
Night≈9–15°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
24°14°20%⌄
Day≈21–27°
Night≈11–17°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
23°13°17.0 mm⌄
Day≈20–26°
Night≈10–16°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
22°13°20%⌄
Day≈19–25°
Night≈10–16°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
20°12°20%⌄
Day≈17–23°
Night≈9–15°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
17°10°29.0 mm⌄
Day≈14–20°
Night≈7–13°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
19°11°20%⌄
Day≈16–22°
Night≈8–14°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
13°5°20%⌄
Day≈10–16°
Night≈2–8°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
14°5°23.0 mm⌄
Day≈11–17°
Night≈2–8°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for Saint-Jean-sur-Richelieu, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.